Is water malleable

Answer 1

It's not entirely clear what you're asking. "Plastic" means, essentially, that something can be molded into another form.
"Malleable" strictly speaking means that something can be hammered into another form.
Plastic is also used to refer to polymeric materials. Most plastics in this sense are not at all malleable; thermoplastic materials can be heated and reshaped, but generally this is not done by hammering.
Malleability is a characteristic associated with metals.

Answer 2

Malleability generally applies to metals in solid form. One definition is:

Ability to be shaped and/or bent, describing a metal or other substance that can be shaped or bent without breaking.

Since liquids cannot be broken and always take the shape of their container, the term does not really apply.

Answer 3

Yes, it can be shaped so yeah.

Answer 4

ice is ,malleable

Answer 5

No